Engineered particles are provided may be used for the delivery of a bioactive agent to the respiratory tract of a patient. The particles may be used in the form of dry powders or in the form of stabilized dispersions comprising a nonaqueous continuous phase. In particularly preferred embodiments the...http://www.google.ca/patents/US20030064029?utm_source=gb-gplus-sharePatent US20030064029 - Engineered particles and methods of use
